NEW ORLEANS — Dr. Anna Pou wasn't worried as she made her way to Memorial Medical Center that sultry August weekend in 2005.

Hurricane Katrina appeared headed to Florida. Even when warnings were issued for New Orleans, the respected cancer surgeon never thought of leaving. She stayed with her patients in what would become a personal and professional hell.

Katrina struck Monday morning, Aug. 29. Power failed, levees broke and 80 percent of New Orleans was flooded. Four days of misery, leading to 34 patient deaths, began at Memorial. In the aftermath, Pou would be accused — and later cleared — of giving lethal doses of drugs to four patients during the chaos.

Three years later, in her most detailed account of the scene since, Pou told The Associated Press she would stay with her patients again if called upon.

Decision not to evacuateHer experience made her a champion of emergency care workers and disaster planning. She helped get landmark state legislation approved to protect the actions of doctors and nurses during disasters.

As the storm passed three years ago, it seemed the decision not to evacuate patients and staff was a good one. They didn't know levees were collapsing.

"We made it through the storm pretty good," Pou remembered. "On Monday, it was just a little hot, but we had some generators working and food and water twice a day."

By Tuesday, water was rising in the streets, eventually reaching 10 feet. The hospital basement flooded and the generators failed.

When nightfall came, Memorial and the city were in darkness. Water pressure dropped, toilets backed up and the temperature in the eight-story building, where windows could not be opened, rose to almost 110 degrees.

"The smell got to be rancid in no time," Pou said. "It burned the back of your throat."

The deteriorating situation had dire consequences for the 2,000 people at Memorial, including more than 200 patients.

"You can't really understand what it was like if you weren't there," Pou said. "Nothing can describe it."

Voices in the darkThose trapped in the hospital could hear voices in the dark. People had broken into a credit union office across the street and holed up there.

"We started hearing stories about murders, about gangs raping women and children," Pou said. "The women that had their children there were really scared."

They had a few flashlights but no spare batteries. At night, rooms and stairways were completely dark.

"One of the nurses showed me how to bump my foot against the next step to find it," Pou said. "We counted the steps from one floor to another so we wouldn't miss one and fall."

"Tuesday night was when we realized we were going to be there for a while," Pou said.

They gathered supplies, rationed food and water with non-patients, and prayed.

Intermittent rescues from roofAbout seven medical staffers, including Pou, stayed with patients. Others went to the roof and the ground floor to coordinate the intermittent rescue efforts with the few boats and helicopters that showed up.

"When a helicopter left, we never knew if they would be back," Pou recalled. "They might be sent to another rescue. And after dark it was too dangerous for them to fly at all."

Under the military's orders, the staff did reverse triage. The healthiest patients were taken out first in an effort to save the greatest number of people.

Many had to be carried to the roof. It was slow, backbreaking work, with as many as 10 people struggling up the dark stairs with a stretcher. At least 34 people died waiting for rescuers.

Pou was one of the last to leave Memorial. She returned to New Orleans — her house had not been flooded — from Baton Rouge a few months later at Thanksgiving. In January 2006, she started working at a Baton Rouge hospital, trying to put Katrina behind her.

Then, in July 2007, she was greeted by four police officers on her arrival home from a 13-hour day of surgery. They handcuffed her, still in her scrubs, and drove her to jail. She was booked on four counts of second-degree murder.

Attorney General Charles Foti accused Pou and two nurses of using a "lethal cocktail" of medication to kill four elderly patients. Pou has always maintained she killed no one during those desperate days, though she acknowledges patients were sedated.

Gave up private practice after arrest
She was forced to give up private practice and started teaching at the LSU medical school in Baton Rouge.

Months of pain and frustration set in.

A year after their arrest, the New Orleans district attorney dropped charges against the nurses, and a grand jury refused to indict Pou. Two civil lawsuits in the deaths are pending.

"I felt very alone," Pou said of her year of fighting the criminal accusations. "Even if people were around me I felt an intense loneliness. It was as if no one knew what I was going through."

Pou's supporters believed she and the nurses acted heroically. A group of doctors and nurses held a rally on the anniversary of her arrest, and hundreds turned in support.

"It was that support and prayer that got me through it," said Pou, who is back in private practice.

As Katrina's third anniversary nears, Pou said the experience was life-altering.

"I've learned a lot from this," she said. "I thought I had suffered at times in my life, but I had no ideal the depths of pain one person could feel. I think that has made me a better person and certainly a more compassionate doctor."

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